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Finding the Fourth Proportional to 77,970.97, 107,573.50 and 63,605.97

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Solution

The fourth proportional to 77,970.97, 107,573.50 and 63,605.97 is: 87,754.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,970.97 : 107,573.50 = 63,605.97 : x
  2. Step 2: Convert to fraction form
    77,970.97/107,573.50 = 63,605.97/x
  3. Step 3: Cross multiply
    77,970.97x = 107,573.50 × 63,605.97
  4. Step 4: Simplify right side
    77,970.97x = 6,842,316,813.80
  5. Step 5: Solve for x
    x = 6,842,316,813.80/77,970.97
  6. Step 6: Final answer
    x = 87,754.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.